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Yamaha · Overhead-cam four-stroke single, wet sump, gearbox shares engine oil, chain drive

SR 125

Library entry covers 1997-2001

28 factory 28 guideline

Published source

Yamaha SR125 Owner's Manual 3MW-28199-E3 (English), Periodic maintenance and lubrication chart pp.6-2 to 6-4

Factory owner's handbook. Covers 2001 (SR125, EU owner's manual 3MW-28199-E3, printed Feb 2001).

Open the source

56 items for a 2001 model, grouped by interval the way a factory chart is laid out.

How this bike is built (what the schedule is based on)

Engine cycle: Four-stroke
Engine lubrication: Wet sump (oil in crankcase)
Oil filtration: Replaceable cartridge or spin-on filter
Valve gear: Overhead cam, screw/locknut adjusters
Ignition: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Fuel injection
Cooling: Air / oil cooled
Primary drive: Gear or chain inside engine, shares engine oil
Gearbox oil: Shares engine oil
Clutch control: Hand lever, cable
Final drive: Chain
Front suspension: Telescopic fork
Rear suspension: Swingarm, twin shocks
Front brake: Disc, hydraulic
Rear brake: Drum (or band / belt rim)
Wheels: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

2001 Yamaha SR 125

On the road: every 300 km

1 item

Check engine oil level

Pre-ride / on the road

Guideline

Each fuel stop on old machines. Dry sump: check the tank hot, engine idling or just stopped, per your manual.

On the road: every 500 km

3 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline
Lubricate drive chain

Pre-ride / on the road

Guideline

Lube warm, ideally at the end of the riding day so it soaks in overnight. Sooner after rain.

On the road: every 1,000 km

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

Every 1,000 km

1 item

Clean drive chain thoroughly (remove and soak, re-lube)

Final drive

Factory

Manual: Drive chain (check slack, alignment; clean and lubricate). Factory: Every 1000 km and after washing or riding in rain

Every 5,000 km or 12 months

3 items

Check throttle cable(s) free play and return

Fuel and air

Guideline
Inspect chain and sprockets for wear (measure stretch)

Final drive

Guideline
Check footrests, pegs, rear brake and gear lever pivots

Rear suspension and frame

Guideline

Every 6,000 km or 12 months

8 items

Change engine oil

Engine

Factory

Manual: Engine oil (change). Factory: Cols 1/6/12/18/24 x1000km; every column incl. initial; annual check; km only
Chassis fasteners (check tightness)

Engine

Factory

Factory: 6000km columns and annual check
Clean carburetor float bowl(s), check float level and jets

Fuel and air

Factory

Manual: Carburetor (check starter operation, adjust idling speed). Factory: Every column incl. initial and annual check
Check battery electrolyte, top up with distilled water

Ignition and electrics

Factory

Manual: Battery (check electrolyte level, specific gravity, breather hose). Factory: 6000km columns and annual check
Grease and check center / side stand and springs

Rear suspension and frame

Factory

Manual: Sidestand, centerstand (check operation, lubricate). Factory: 6000km columns and annual check
Adjust rear drum brake and rod / cable linkage

Brakes

Factory

Manual: Rear brake (check operation, adjust pedal free play; shoes). Factory: Every column incl. initial and annual check
Check brake pads and discs

Brakes

Factory

Manual: Front brake (check operation, fluid level, leakage; pads). Factory: Every column incl. initial and annual check
Lubricate control cables and lever pivots

Controls and cables

Factory

Manual: Moving parts and cables (lubricate). Factory: 6000km columns and annual check

Every 6,000 km

10 items

Check and adjust valve clearances

Engine

Factory

Manual: Valves (check clearance, adjust). Factory: 6000km columns; from 30000km repeat from 6000km
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Factory

Manual: Clutch (check operation, adjust). Factory: Marked 1000km initial, then every 6000km
Timing chain (check tension, adjust)

Final drive

Factory

Factory: 6000km columns
Check steering head bearing adjustment

Front end

Factory

Manual: Steering bearings (check play and roughness). Factory: Marked 1000km initial, then every 6000km
Inspect fork seals, stanchions and fork boots

Front end

Factory

Manual: Front fork (check operation and oil leakage). Factory: 6000km columns
Check swingarm bushes for play

Rear suspension and frame

Factory

Manual: Swingarm (check operation and excessive play). Factory: 6000km columns
Inspect rear shocks for leaks and damping

Rear suspension and frame

Factory

Manual: Shock absorbers (check operation and oil leakage). Factory: 6000km columns
Check spoke tension and wheel true

Wheels and tires

Factory

Manual: Wheels (check runout, spoke tightness; tighten spokes). Factory: 6000km columns
Check wheel bearings for play

Wheels and tires

Factory

Manual: Wheel bearings (check looseness or damage). Factory: 6000km columns
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Tires (check tread depth, damage, pressure). Factory: 6000km columns

Every 6,500 km or 12 months

1 item

Lubricate brake cam spindles, check linings and drums

Brakes

Guideline

Every 8,000 km or 12 months

1 item

Replace oil filter

Engine

Guideline

Every 9,500 km or 12 months

2 items

Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Lubricate speedometer / tachometer cables, check drive

Controls and cables

Guideline

A dry speedo cable whips the needle and eventually kills the instrument.

Every 12,000 km

5 items

Clean oil strainers / mesh screens

Engine

Factory

Manual: Engine oil filter element (clean). Factory: Marked 1000km initial, 12000km, 24000km
Inspect, clean and gap spark plugs

Engine

Factory

Manual: Spark plug (check condition, clean and regap). Factory: Marked at 6000km and 18000km
Replace spark plugs

Engine

Factory

Manual: Spark plug (replace). Factory: Marked at 12000km and 24000km
Clean / inspect air filter

Fuel and air

Factory

Manual: Air filter element (clean). Factory: Clean at 6000km and 18000km
Replace air filter element

Fuel and air

Factory

Manual: Air filter element (replace). Factory: Marked at 12000km and 24000km

Every 16,000 km or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 19,500 km or 2 years

2 items

Synchronize throttle bodies

Fuel and air

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

Every 24,000 km or 3 years

1 item

Change fork oil

Front end

Guideline

Some early telescopic forks are grease filled or use very small oil quantities. Check your manual.

Every 24,000 km

2 items

Repack / replace steering head bearings

Front end

Factory

Manual: Steering bearings (lubricate, lithium-soap grease). Factory: Every 24000 km
Replace brake linings / skim drums (wear based)

Brakes

Guideline

Every 29,000 km

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

Every 32,000 km or 4 years

1 item

Repack / replace wheel bearings

Wheels and tires

Guideline

Cup-and-cone and taper roller hubs need periodic repacking and adjustment.

Every 38,500 km or 4 years

1 item

Replace fuel filter

Fuel and air

Guideline

Every 40,000 km or 6 years

1 item

Replace swingarm bushes / bearings

Rear suspension and frame

Guideline

Every 48,500 km or 6 years

1 item

Rebuild forks: seals, bushes, springs

Front end

Guideline

Every 6 months

1 item

Clean battery terminals, check charge and strap

Ignition and electrics

Guideline

Every 2 years

4 items

Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Guideline
Rebuild calipers and master cylinders (seals)

Brakes

Factory

Manual: Brake master cylinder and caliper internal components (replace). Factory: Every two years (NOTE under chart)
Replace brake fluid

Brakes

Factory

Manual: Brake fluid (change, with master cylinder and caliper internals). Factory: Every two years (NOTE under chart)

Every 4 years

2 items

Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.
Inspect brake hoses; replace old rubber

Brakes

Factory

Manual: Brake hoses (replace). Factory: Every four years (NOTE under chart)

Every 6 years

2 items

Replace inner tubes and rim tape with tires

Wheels and tires

Guideline
Replace tires on age (regardless of tread)

Wheels and tires

Guideline

Guideline lines: Intervals here are general guidelines for the machine's era and layout, compiled for this app. They are not factory manual figures. Check your workshop manual, and edit any interval in the bike's Schedule tab.